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Note 9 - Long-term Debt - Notes Payable (Details) - Senior Promissory Notes [Member] - USD ($) | Dec. 31, 2022 | Jun. 22, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Senior Promissory Notes | $ 6,000,000 | $ 6,000,000.0 | $ 0
Less: unamortized debt discount | (519,686) | $ (695,749) | 0
Senior Promissory Notes payable | 5,480,314 |  | 0
Current portion of Senior Promissory Notes payable | 0 |  | 0
Senior Promissory Notes payable, less current portion | $ 5,480,314 |  | $ 0

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